NOC CLB Level Test result for each ability
Speaking Listening Reading Writing
0, A 8 6.5 7.5 6.5 6.5
0, A 7 6.0 6.0 6.0 6.0
0, A, B 6 5.5 5.5 5.0 5.5
B 5 5.0 5.0 4.0 5.0
B 4 4.0 4.5 3.5 4.0
If you belong to NOC O and A - you have retake the Exam ( All sections you need score 6)
If You belong to NOC B - you score would be fine for CEC application ..
since you role looks like manager role which belongs to NOC O or A .
Since, you are manger working for IT company , I believe you fall under Skill Level A .. so you need to score minimum 6 in all 4 categories .. your score didn't met cec requirement ..